Type-writing machine.



J. J. 000mm. TYPE WRITING MAGHIINIB. Rrpwuron rum) 211.18, 1910. 1 1 22,3 5; Patented Dec. 29, 1914.

3' SHEETS-SHEET 1.

J.J.CO0PER. TYPE WRITING MACHINE. APPLICATION FILED APR. 16. 1910.

Patented Dec. 29, 1914.

3 SHEETS-SHEET 2.

Fig.5.

J. J. COOPER. TYPE WRITING MACHINE.

" APPLICATION rump APR. 10, 1910.

1 1 22,865; Patented Dec. 29, 1914.

s snxmra-snnnr sf Fig.5. J h c 1) E H K J Fig.4

Q .:'l A151) G e 1 Q a 1 i g f Inventor.-

STATES PATENT OFFICE.

Lion JOSEPH 0002123, or LONDON, ENGLAND, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, or ew YORK, N. Y.-, A CORPORATION oannw JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

"Patented Dec. 29, 1914.

' Application filed April 16. 1910. Serial No. 555,800.

' To all whom it may concern:

.Be it known that 1, JOHN J osnrri Coornn,

resident of 120 Queen Victoria street, Lon- ,don, England, type-writer mechanic, have inventedcertain new and useful Improvemeats in Type-Writing Machines, of which the following is a specification.

This-invention relates to means for controlling the revolution of the platen of a typewriting machine and has for its primary object to facilitate the filling in. of continuous-strip irivoice forms wherein a number of individual and identically similarinvoice-forms are provided on a web or continuous strip of-paper, successive forms being separated by rows of perforations, for tearing off said invoice after being written upon.

According to the present invention means are provided""whereby, after an invoice blank has been'filled, the platen may be rotated in the forward direction (1'. 6. so as to advance the web) through an automatically determined distance, to bring the first blank of the next ,invoice to the printing point, that is, to the proper position for comments ing writing thereon, i. e. at a point immedi ately below the heading printed on the new invoice.

I employ a device to limit the extent to which the platen may be rotated line-byline. This device is in the nature of an arm or member which is connected to the platen to rotate therewith, but which is capable of only limited rotation, whereby th rotation of the platen is limited. As -ths operator typewritesthe invoice, the platen is rotated linc-by-line together with said armrand at the conclusion of the writing of the invoice,

the platen is rotated further by the operator,

until said arm is arrested by a stop. The

' platen is now in apposition to begin the nwriting of the first line on a new invoice.

Said arm is now-set backwardly, while the platen remains stationary; a stop being provided to limit the return motion or setting of said arm. At the conclusion of said return motion, the arm reconnects to the platen, and is therefore ready to arrest the? latter again in proper position to begin the first line f writing on thefsucceeding invoice. 1

Inthe accompanying drawings, Figures 1 thereof.

and 9 are similar end views of the device of the present invention in its preferred form, the pawl-carrying arm beingshown in Fig. 1 as having been turned backward until arrested by the adjustable stop, and in Fig. 2 as having been turned forward until arrest,- ed by a stop, the hand-wheel on the end of the platen-spindle being removed in each case. Fig. 3 is a plan view of the parts in the position shownin Fig. 1. Fig. 4 is a "horizontal section on line 44 of Fig. 1.

Fig. 5 is a section of the pawl and immediately adjacent parts, taken on the axial plane of the locking bolt (line 5-f of Fig. 2) this figure being drawn to a larger scale.

In the form of the invention illustrated in the drawings, a ratchet-Wheel A having a number of teeth equal to that of the usual line-space ratchet wheel M, and corresponding to the number of line-spaces comprised in one revolution of the platen B, or spaced in agreement with the line space distances on the platen, is mounted fast on the platenspindlc b and is engaged by a spring-pressed pawl or dog C pivoted by a screw J on a radius-arm D forming a driver for the platen andrigidly .connected to a handwheel (I (or equivalent driving device), said arm 1) being mounted to rotate concentrically with the platen but independently Said pawl C forms a clutch and the forward revolution of the platen B (and therefore of the ratchet wheel A) produced by means of the ordinary line spacing "mechanism, will cause arm D and pawl C to turn with the platen, because the pawl and arm will be driven by the ratchet A, which rotates with the platen. The platen may be rotated forwardly by the hand-wheel (Z (but not backwardly) through the pawl C, a spring y' holding the pawl locked to the ratchet wheel A during such forward. movement, but permitting the pawl to ride over the ratchet teeth during the backward rotation of the hand-wheel cl.

The forward rotation of the platen B for each invoice is limited by a stop E, adapted to be encountered by the pawl C. The extent of the re-setting or free backward rotation of the pawl C about the platen axis is determined by an adjustable stop 7'', which is placed at such a distance from the stop E as to correspond to the length of one invoice or printed section of the web.-

,tomatically arrested by the engagement of the pawl G with the stop E when the position is reached for commencing writing upon the next invoice form or section; whereupon the pawl, O must be re-set or shifted back until arrested by the stop f.

The stop 7 is constantly in use to determine the position to whichthe platen shall be rotated to bring a fresh blank upon a printed roll or strip of paper to writing position. For this purpose, the stop 7 is adjustably mounted in a stationary disk G, whereby the angular distance between said stop and the stop E may be adjusted to correspond with the length of the blanks. The distance between the stop fand the stop E being constant, the hand wheel 03 when operated will alwaysv bring the platen into position for beginning the next blank regardless of how much line-spacing has been done on the preceding blank.

The adjustable stop f may be of any wellknown construction such as a springpressed bolt carried by a socket on an arm F rotatable about the platen-axis, the bolt F being adapted to engage any one of a circular series of holes 9 provided in the stationary disk G mounted concentrically with the platen axis and serving also to carry the stop E, while the head i of the bolt serves for withdrawing the latter from the holes 9 and for turning the arm F about the disk G as required.

As it may be necessary, particularly when first adjusting the invoice-strip in position relatively to the printing-point to rotate the platen B by usual means (such as the ordinary hand-wheelnl which is situated at the opposite end of the platen-spindle b' from the device forming the subject of the present invention), through an angle greater than that which is bounded by the fixed and adjustable stops E and f respectively, the pawl C is preferablyjprovided with means whereby it-may be temporarily thrown out of gear with the ratchet Wheel A when required; and said means ,may be brought into permanent operation when. the

machine is used for ordinary corre'spo'ndence.

The drawings show a convenient,, dev1 ce for this purpose, COIlS1StlI1g..Qf18. spr ng pressed locking-bolt H carried by the pawl tached to the arm D already mentioned;

the bolt H being adapted to enter a recess It provided on the arm D so as to lock the pawl when the latter is thrown out of en- 1 gagement with the teeth of the, ratchet 1 wheel A in opposition to the spring'j. The stem of the bolt H may carry at its outer end a handle K whereby to withdraw the bolt from the recess h and turn thepawl C about the pin J as required.

The line-spacing devices in this class of machines usually comprise a line space wheel M, connected to platen B, a pawl N to drive the Wheel and platen, and a detent O to engage the wheel to hold it stationary. iVheels A and M should of course have equal numbers of teeth.

Having thus described my invention, I claim: i

1. In a typewriting machine having a rotary platen and provided with line-spacing mechanism comprising a ratchet-wheel, the combination of a second ratchet-wheel turning as one with the platen and having teeth spaced in agreement with the toot, distances on said first-named ratchet-wheel, a manually rotatable radius-arm mounted concentrically with said second ratchetwheel, a spring-pressed pawl pivoted to said arm and adapted to transmit motion from' said second wheel, and a stop-arm freely rotatable about the axis of the dislcaud carrying a spring-pressed bolt adapted to en gage any one of the holes in the disk; said stop-arm constructed to arrest the first-mentioned arm.

2; In a typewniting machine having a 1'0- tary platen and provided with line-spacing mechanism comprising a toothed line-space wheel, the combination of a ratchet-wheel turning as one with the platen and having teeth spaced in agreement with the tooth distances on said line-space wheel, a menually rotatahle radius-arm mounted concentrically the saidratehet-wheel, a pawl pivoted to said arni'and spring-pressed into engagement with the said ratchet-wheel to transmit motion from the said ratchet wheel to the arm, a stop for arresting the forward movement of the radius farm, means for. limiting the backward movement of said. 'arm-,;,andja spring-pressed bolt carried by the pawPaud adapted to engage 'a 'notchvon the radiusrarm and'hold the 01f the said ratchet wheel while the ra insarm is rotated.

3. In a typew na machine, the coinbination with a platen and line-spacing mechanism, of an arm, a yielding pawl to constantly connect the arm with the platen to be turned thereby, and to permit retraction of the arm independently of the platen, and relatively adjustable stops between which the arm may vibrate; one of said stops 00- operating with the arm and pawl to lock the platen against advance rotation.

4. In a typewriting machine, the combination with a platen and line-space mechanism therefor, of a ratchet connected with the'platen, an arm, a pawl on the arm nor mally in mesh with the ratchet, and stops between which the arm swings, one of said stops being adjustable, said line-space mechanism effective to turn the arm idly until its pawl strikes one of the stops to arrest the platen.

5. In a typewriting machine, the combination with a platen and line-space mechanism' therefor, of a ratchet connected with the platen, an arm, a pawl on the arm normally in mesh with the ratchet, stops between which the arm swings, one of said stops being-adjustable, said line-space mechanism effective to turn the arm idly until its pawl strikes one of the stops to arrest the platen, and a catch to hold the pawl in inoperative position.

6. In a tvnewriting machine, the combination with a platen and its axle, of a linespacing mechanism, a ratchet fast on the axle, a swinging arm, a pawl yieldingly in mesh with the ratchet to advance the arm, and riding idly over the ratchet when the arm is manually swung in the opposite direction, 'and relatively adjustable stops between which the arm swings. I

7. In a typewriting machine, the combination with a platen and a line-spacing mechanism 'therefor, of a pawl, means to connect said pawl to the platen to enable the pawl to be advanced thereby at the line spacing operation, means independent of said line-spacing mechanism for moving said pawl to advance said platen, a stop to limit the advance of the pawl and platen, said pawl being retractible independently of the platen, and a stop to limit the retraction of the pawl; said pawl, after it has been retracted, being again movable into connection with the platen to be advanced therewith step-by-step in line-space direction, until arrested by the first-mentioned stop.

8. In a typewriting machine, the combination with a platen and a line-spacing mechanism therefor, of a pawl, means to connect said pawl to the platen to enable the pawlto be advanced thereby at the linespacing operation, a stop to limit the advance of the pawl and platen, said pawl being retractible independently of the platen, and a stop to limit the retraction of the pawl, said stops being relatively adjustable.

9. In a typewriting machine, the'combination with a platen and a line-spacing mechanism therefor, of a pawl, means to connect said pawl to the platen to enable the pawl to be advanced thereby at the linespacing operation, a stop tolimit the ad vance of the pawl and platen, said pawl being retractible independently of the platen, a stop to limit the retraction of the pawl, said stops being relatively adjustable, and means to silence said pawl at will, to permit indefinite advance rotation of the platen.

10. In atypewriting machine, the combination with a revoluble platen and a linespacing mechanism therefor, of a revoluble arm, a pawl upon said arm, a wheel connected to said platen and engageable by said pawl'to advance the pawl and arm at the line-spacing operation, a finger-piece connected to said arm to rotate the same and said pawl to advance said platen, a stop to limit the advance of the platen, pawl, arm and finger-piece, said pawl being retractible by said finger-piece independently of the platen and wheel, and a stop to limit the retraction of the pawl.

11. In a typewriting machine, the combination with a revoluble platen and a line spacing mechanism therefor, ot' a revoluble arm, a pawl upon said arm, a wheel connected to said platen and engageable by said pawl to advance the pawl and arm at the line-spacing operation, a finger-piece connected to said arm to rotate the same and saidpawl to advance said platen, a stop to nationwith aplaten, of a platen-rotating mechanism comprising a ratchet rigidly connected to the platen, a driven, a handle thereon, said driver turning about the platen axis and relatively to the platen, and having a pawl to ride idly over the ratchet when the driver is moved rearwardly, and to retate the ratchet and platen when the driver is moved forwardly, means to hold the pawl on the ratchet and cause the driver to be carried with the platen when the platen is rotated forwardly independently of power supplied through the driver, a fixed stop in the path of the driver to arrest the driver when turned in one direction, and a stop adjustable relatively to the fixed stop and engaged by the driver to control the extent of rotation of the platen.

13. In a typewriting machine, the combination with a platen, of platen-rotating vmechanism including a driver mounted to rotate about the platen axis and a handle on the driver, means cooperating with the driver to turn the platen throughout a variable number of line-spaces, said driver connected with the platen to turn the latter only when swung in one direction, and carried with the platen in said direction when the platen is rotated by power supplied independently ot' the driver, and stops in the path oi? the driver between vrhich the driver plays, to regulate the amount of rotation of the platen, one of said stops being adjustable.

14. Thecombination with a rotary platen, of means'to rotate the platen a predetermined distance, said means comprising a driver having a limited movement, the platen being rotatable a variable portion of said distance independently of power supplied through the driver and after the driver has been brought to its starting position, and means, to connect the driver to the platen and cause the platen, when the driver is operated to the limit of its forward movement, to be rotated by the driver the remainder only of said predetern'lined distance.

of means to complete the rotation of the platen through a predetermined distance from its starting position, comprising a driver for said platen; means to determine the starting position of the driver; means to limit the stroke of the driver; the platen, after thedriver has been brought to said starting position, being rotatable independ ently of power supplied. through the driver, to introduce a work-sheet and feed it over the platen; and means to form a driving connection between the platen and driver and enable the driver, when operated to its forward limit after said independent rotation of the platen, to rotate the platen 15. The combination With a rotary platen,

through the remainder of such predeten' mined distance.

16. The combination. With a rotary platen, of mechanism for effecting rotations of the platen through a predetermined distance, said mechanism comprising a driver, and initial and final stops for the driver, the platen being rotatable through a variable portion oi saiddistance independently of power transmitted through the driver, means to move the driver during said rotation of the platen to a position corresponding to the extent of said rotation, said driver operablc when moved from said po sition to its linal stop, to complete the rotation 01 the platen through said predetermined distance ii'roin its starting position.

17 The combination with a rotary platen, of a driver rotatable about the platen axis, initial and final stops for the driver, means to connect the. driver to the platen to cause the driver to rotate the platen, said driver operable when moved from its initial to its final -position, to rotate the platen through a definite angle, and means for rotating the platen independently of power supplied through said driver for introducing and writing upon a work-sheet after the driver has been brought to its starting position, said connecting means operable to cause the driver to be moved during said last-named rotation of the platen to a position determinedby the extent of said rotation, said driver operable when moved to its final stop position to complete the rotation of the platen through said angle.

JOHN JOSEPH COOPER.

lVitnesses HERBERT D. JAMEsoK,

R. F. WILLIAMS, L. G. MORGAN. 

